87877001 has 2 divisors, whose sum is σ = 87877002. Its totient is φ = 87877000.

The previous prime is 87876983. The next prime is 87877003. The reversal of 87877001 is 10077878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82810000 + 5067001 = 9100^2 + 2251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87877001 is a prime.

Together with 87877003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87877003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43938500 + 43938501.

It is an arithmetic number, because the mean of its divisors is an integer number (43938501).

Almost surely, 2^87877001 is an apocalyptic number.

It is an amenable number.

87877001 is a deficient number, since it is larger than the sum of its proper divisors (1).

87877001 is an equidigital number, since it uses as much as digits as its factorization.

87877001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21952, while the sum is 38.

The square root of 87877001 is about 9374.2733585062. The cubic root of 87877001 is about 444.5886886643.

The spelling of 87877001 in words is "eighty-seven million, eight hundred seventy-seven thousand, one".